The effect of grassy field margins and fertilizer on soil water, plant nutrient levels, stem borer attacks and yield of maize in the humid forest zone of Cameroon

2006 ◽  
Vol 42 (3-4) ◽  
pp. 461-470 ◽  
Author(s):  
Rose Ndemah ◽  
Fritz Schulthess ◽  
Christian Nolte
Keyword(s):  
Soil Water ◽  
Stem Borer ◽  
Field Margins ◽  
Plant Nutrient ◽  
Forest Zone ◽  
Humid Forest ◽  
Nutrient Levels ◽  
Humid Forest Zone ◽  
Water Plant

Abundance, dispersion and parasitism of the stem borer Busseola fusca (Lepidoptera: Noctuidae) in maize in the humid forest zone of southern Cameroon

2005 ◽  
Vol 95 (2) ◽  
pp. 169-177 ◽  
Author(s):  
A. Chabi-Olaye ◽  
C. Nolte ◽  
F. Schulthess ◽  
C. Borgemeister
Keyword(s):  
Host Plants ◽  
Busseola Fusca ◽  
Stem Borer ◽  
Forest Zone ◽  
Humid Forest ◽  
Humid Forest Zone ◽  
Short Rainy Season ◽  
Southern Cameroon ◽  
Egg Parasitism ◽  
Lepidoptera Noctuidae

AbstractThis study was conducted in the humid forest zone of Cameroon, in 2002 and 2003. The main objective was to investigate the effects of intercropping on infestation levels and parasitism of the noctuid maize stem borer Busseola fusca Fuller. Two trials were planted per year, one during the long and one during the short rainy season. Maize monocrops were compared with maize/legume or maize/cassava intercrops in two spatial arrangements: maize on alternate hills or in alternate rows. Spatial analyses showed that the stemborer egg batches were regularly dispersed in the maize monocrop and aggregated in the intercrops, as indicated by b, the index of dispersion of Taylor's power law. Depending on the crop association and planting pattern, intercrops reduced the percentage of plants with stem borer eggs by 47.4–58.4% and egg densities by 41.2–54.5% compared to monocropped maize. Consequently, larval densities were 44.4–61.5% lower in intercrops compared to monocrops. Intercropping maize with non-host plants did not affect larval parasitism. Up to two-fold higher levels of egg parasitism by scelionid Telenomus spp. were recorded in inter- compared to monocrops during the short rainy seasons of 2002 and 2003. No differences were found among the mixed cropping treatments and parasitism was lower during the long compared to the short rainy seasons. It was proposed that differences in levels of parasitism were due to density dependence effects rather than the effect of the presence of non-host plants in the system.

Forage yield and nutritive quality of haulm from dual-purpose cowpea cultivars for dry season, livestock and feeding in Nigeria

1970 ◽  
Vol 29 (4) ◽  
pp. 483-496
Author(s):  
N.J. Anyanwu ◽  
O.S. Onifade ◽  
J.A. Olanite ◽  
V.I.O. Olowe ◽  
B.O. Boukar ◽  
...  
Keyword(s):  
Crude Protein ◽  
Dry Season ◽  
Forage Yield ◽  
Forest Zone ◽  
Dual Purpose ◽  
Humid Forest ◽  
Cowpea Cultivars ◽  
Humid Forest Zone ◽  
Nutritive Quality

The availability of high quality forage, especially during the dry season remains a major challenge to ruminant livestock production in Nigeria and many parts of West Africa. This study was conducted to evaluate forage yield and nutritive quality of haulm from selected dual purpose cowpea (Vigna unguiculata L. Walp.) cultivars in the humid rain forest zone of Nigeria. The forage and pod yields of twenty cultivars were evaluated at the Teaching and Research Farm of the Federal University of Technology, Owerri, Imo State, Nigeria. Subsequently, five dual-purpose cultivars, namely IT04K-334-2, IT07K-293-3, IT04K-194-3, IT04K-405-5, IT06K-147-2, were selected based on forage and pod yields from previous trial, for determination of chemical and fibre compositions. The results revealed significant (P<0.05) differences in pod and forage yields among the twenty cowpea cultivars, with yields ranging from 0-1.5 t ha-1 and 0.1-4.5 t ha-1 for pod and forage, respectively. Cultivars IT07K-293-3, IT04K-405-5, IT06K-147-2, IT07K-194-3, IT04K-334-2, IT04K-267-8 and IT04K-339-1 recorded the highest fodder yields of at least 2715 t ha-1, with crude protein contents ranging from 10.49% in IT07K-194-3 to 13 .57 % in IT04K-405-5. Cultivars IT07K-194-3, IT07K-293-3, IT07K-220-1-9, IT06K-147-2, IT07K-187-55IT04K-332-1 recorded the highest pod yields (>700 t ha-1). There were significant (P<0.05) differences in crude protein, ether extract and non-fibre carbohydrates (NFC) contents among five cultivars selected from the top ten high yielding cultivars, based on mean ranking score. These selected cultivars are recommended as dual-purpose cowpea for the humid forest zone.

Möglichkeiten und Probleme von Waldbewirtschaftung und Aufforstung in der Feuchtwaldzone der Côte d’Ivoire

2002 ◽  
Vol 46 (1) ◽  
Author(s):  
Jan Peter Mund ◽  
Martin Doevenspeck
Keyword(s):  
Forest Management ◽  
Cote D'ivoire ◽  
Ivory Coast ◽  
National Park ◽  
Local Population ◽  
Pilot Projects ◽  
Forest Zone ◽  
Humid Forest ◽  
Village Level ◽  
Humid Forest Zone

AbstractChances and problems of forest management and afforestation in the humid forest zone of the Ivory Coast: Far-reaching changes in the forestry legislation since 1994 force the timber companies in the Ivory Coast to carry out afforestation measures for and with the local population in their concession areas. By the example of one of the first pilot projects the authors analyse the execution of reforestation at a village level. From the view of pedology they discuss the restrictions of possible afforestation measures in the adjacent areas of a national park

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